November 17, 2018

Rudder Ice


Kingston, Ontario, 1974.

Photo by I. Peterson

November 16, 2018

Ptolemy and Regiomontanus



This frontispiece from Epitoma in Almagestum Ptolemaei, published in 1496, shows its author, Regiomontanus, and a crowned Ptolemy.

Reproduced from the collections of the Library of Congress.

November 15, 2018

Madison Glow


Wisconsin State Capitol, Madison, Wisconsin, 2008.

Photo by I. Peterson

November 14, 2018

Shore Splash


Ocean City, Maryland, 1979.

Photo by I. Peterson

November 12, 2018

November 11, 2018

November 10, 2018

Model Surface


Mathematics Department, University of Nebraska, Lincoln, Nebraska, 2012.



Photos by I. Peterson

November 9, 2018

Brooklyn Bridge


Brooklyn Bridge, New York City, New York.

Photo by I. Peterson

November 8, 2018

Elements 29


Elements Number 29 by Siah Armajani. Sculpture Garden, New Orleans Museum of Art, New Orleans, Louisiana, 2010.

Photo by I. Peterson

November 7, 2018

Five Plates Two Poles


Five Plates, Two Poles by Richard Serra, East Building, National Gallery of Art, Washington, D.C., 2017.

See also "Three of Five."

Photo by I. Peterson

November 6, 2018

American Way


Wall mural, Washington, D.C., 2018.


Photos by I. Peterson

November 5, 2018

Forest Rainbow


Rainy River, Ontario, 1977.

Photo by I. Peterson

November 4, 2018

Fragments in Flight


Market Street, Philadelphia, 2000.


Photos by I. Peterson

November 2, 2018

Cathedral of Learning


Cathedral of Learning, University of Pittsburgh, Pittsburgh, Pennsylvania, 2010.

Photo by I. Peterson

November 1, 2018

Being Elderly


The Dignity of Being Elderly by Shirley Rush Dean. Bethesda, Maryland, 2018.

Photo by I. Peterson